American "Shore Patrol" M1 Helmet Korean War

American M1 Helmet Korean War Shore Patrol.

Steel Outer Shell

• Manufacturer: Pressed by the McCord Radiator and Manufacturing Company.
• Lot Number: Heat stamp 1165 stamped inside the front lip.
• Production Date: Manufactured between December 1944 and February 1945.
• Transitional Period: Batch 1165 sits exactly on the McCord production transition line.
• Rim Type: One of the final production runs featuring a manganese steel rim.

Inner Liner System

• Co-Manufacturers: Built under a joint wartime contract by Westinghouse Electric Company and Capac Manufacturing Company.
• Construction: High-pressure molded, cloth-reinforced plastic base.
• Markings: Features the molded Westinghouse logo combined with Capac parts and internal stamps.

Military Service

• Deployment: Reissued for active duty during the Korean War (1950–1953).
• Insignia: Stenciled with the letters "Shore Patrol" (SP).
• Role: Used by the US Navy or US Marine Corps (USMC) military policing units for land-based law enforcement.